Rack



FIG. 1 is a top perspective view of a rack, showing the rack in use, in accordance with the present invention;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a bottom perspective view thereof:

FIG. 4 is a rear view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a bottom side view thereof; and,

FIG. 9 is a top side view thereof.

The broken lines are to disclose portions of the rack and related environment, which form no part of the claimed design. 

CLAIM The ornamental design for a rack, as shown and described. 